Shifting-mechanism.



Patented Jan. 24, 1911.

l A. H.v VIK. -SHIFTING MEOHANISM. 'i APPLIUATION FILED 110V. 30, 1909.

.El Y

attozneq' rnran'r ernten.

.ANDREW H. VIK, 0F POULSBO, WASHINGTON, ASSIGNOR OF ONE-HALF TO RASMUSH. VIK, 0F POULSBO, WASHINGTON.

SHIFTING MECHANISM.

Specification of Letters Patent.

Patented Jan. 24, 1911.

Application filed November 30, 1909. Serial No. 530,659.

To all whom it may con-cera:

Be it known that I, ANDREW I-l. Vin, a subject of the King ot' Norway,and a resident of the town oit Ioulsbo, in the county of Kitsap andState of lVashington, have invented certain new and useful Improvementsin Shifting Mechanism, ot' which the following is a specification.

The primary aim ot' the present invention is the provision ot' improvedshitting means for adjusting variable speed mechanisms.

The invention embraces certain novel -teatures in the construction andarrangement. of parts as hereinafter set forth and defined in theappended claims.

lVth reference to the accompanying drawing wherein like referencenumerals designate corresponding parts throughout: F igure 1 is a sideelevation of a pulling and hauling' mechanism with my invention appliedthereto. Iiig. 2 is a fragmentary section on line 2 2 of Fig. 1, andFig. 3 is a section on line 3 3 of Fig. 1.

lVith reference to the drawing numeral 1 designates a drum rotatablymounted in a suitable frame 2 in connection with a drive gear wheel 10and a drive pinion l1, and 4 indicates a longitudinally adjustable shaitrotatably supported in said frame and having a driving wheel 4:0 and adriving pinion L11 secured thereto for engagement with gears 11 and 10respectively as may be desired to operate the drum at relatively high orlow speed.

For the purpose of effecting adjustment of shaft 4l- I provide a rackand pinion device comprising a rack 5, secured to a sleeve 50 loose onthe said shaft and provided with a collar 50 engaged in a thrust bearingon frame 2, and a pinion C secured to a rod G0 rotatably mounted insuitable hangers GO ot' a head 70 which is secured to shaft l1. In thearrangement shown7 head 70 has extension in the form of a sweep 7, androd G0 is likewise extended and provided at the outer end with a handwheel G1 and a ratchet wheel (32, the latter of which is normallyengaged by a relatively iixed pawl G3 mounted on the sweep.

In the position of the parts as shown pinion l11 is meshing with wheel10 for elieeting, by rotation of shaft 4, a relatively low speed motionof the drum. If desired to increase the speed of the drum, pawl 63 isdisengaged i from its ratchet to release rod G0 for rotation with pinion6. Shaft Il will then be free to slide longitudinally and come bygravity to a lowered position wherein gear wheel 4.0 meshes with pinion11. Adjust.- ment of shaft et in a reverse direction to that justdescribed is eli'ected by rotating pinion (i, through the medium 0i handwheel G1 in the proper direction to canse it to ride npwardly on rack 5,as will be obvious.

In connection with drum 1 I have shown a back stop mechanism comprisinga ratchet wheel 19., secured to the drum, and a relatively fixed pawl 13which is connected by means of a shifter 82, with a slip collar 8mounted on sleeve 50 and having spaced apart extensions S which slidablyembrace rack 5. Shifter 82 comprises a stem 83 slidably mounted on frame2, and arms 84 and S5 secured to said stem and engagedrespectively withcollar 8 and the stem of pawl 13 whereby upward movement of the collarelevates the shifter to move p'awl 13 to a releasing position withrespect to its ratchet. Such movement of the collar is convenientlyeil'ected through the medium of a rope 80 secured thereto and leadingover an elevated guide S1 on head 70 and thence to the outer end ofsweep 7.

lVith the parts adjusted as in the drawing, the operation is as follows:A pulling and hauling cable is secured to drum 1 and power applied tothe sweep to rotate shaft 4l: and thereby drive the drum through themedium oi the gears fl-l and 10 to eil'eet the desired pullingoperation, as for example, to extract a stump. If desired to then moveor haul the stump, pawl 63 is disengaged from its ratchet to releasepinion 6 for lowering movement of shaft 4 to bring wheel 40 into meshwith pinion 1l for operation of the drum at relatively high speed.

When desired to effect a subsequent pulling operation, hand wheel (31 isrotated to canse pinion G to ride upwardly on rack 5 and thereby elevateshaft 4t a suitable degree to carry wheel l10 just clear of pinion 11.Collar 8 is then drawn upwardly by pulling on rope 80 to operate shifterS2 to disengage pawl 13 from its ratchet and thereby release the drulnior run out of the cable. Hand wheel G1 is then further rotated to bringpinion 41 into mesh with wheel 10 and the pulling operation proceededwith as before.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States of America, is:

l. A shifting mechanism comprising an element, means supporting saidelement for rotation and for adjustment longitudinally of its axis, anda device for effecting longitudinal adjustment of said elementcomprising a pinion supported thereby to be carried with it during itsrotary movement and longitudinal adjustment, and a rack supported on arelatively fixed part.

2. A shifting mechanism comprising a rotatable element, means supportingsaid element for rotation and for longitudinal adj justment, a sweepconnected to said element for rotating the same, and a device comprisingcompanion rack and pinion members for effecting longitudinal adjustmentof said element and being rotatable therewith, one of said members beingmovable longitudinally with said element and the other being supportedon a relatively fixed partagainst thrust of its companion member.

3. A shifting mechanism comprising a rotatable element, means supportingsaid element for rotation and for longitudinal adjustment, a sweepconnected to said element for rotating the same, means for adjustingsaid element longitudinally, said last means being rotatable with saidelement and comprising a pinion carried by said element and a racksupported on said first means and meshing with said pinion, andoutwardly for rotating the same, means for adjusting said elementlongitudinally, said last means being rotatable with said element andcomprising a pinion carried by said element and a companion racksupported on said first means, a rod fixed to said pinion and journaledon said sweep, means engaged with the outer end of said rod for rotatingthe same, and means for holding said rod against rotation.

5. In apparatus of the character described, a drum, means supportingsaid drum for rotation, a shaft supported for rotation and forlengthwise adjustment, a driving connection between said shaft and drumcomprising gears of relatively large and small diameter arranged foradjustment by sliding movement of said shaft to effect the operation ofsaid drum at varying speeds, and means for shifting said shaft, saidlast means being rotatable with said shaft and comprising a rack andpinion device.

Signed at Seattle, Vashington this 19th day of November 1909.

ANDREV H. VIK.

YVitnesses HEROHMER JOHNSTON, ARLrrA ADAMS.

